ovsdb/ovsdb-tool.c

   1 /*
   2  * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <getopt.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "column.h"
  26 #include "command-line.h"
  27 #include "compiler.h"
  28 #include "dirs.h"
  29 #include "dynamic-string.h"
  30 #include "fatal-signal.h"
  31 #include "file.h"
  32 #include "lockfile.h"
  33 #include "log.h"
  34 #include "json.h"
  35 #include "ovsdb.h"
  36 #include "ovsdb-data.h"
  37 #include "ovsdb-error.h"
  38 #include "socket-util.h"
  39 #include "table.h"
  40 #include "timeval.h"
  41 #include "util.h"
  42 #include "openvswitch/vlog.h"
  43
  44 /* -m, --more: Verbosity level for "show-log" command output. */
  45 static int show_log_verbosity;
  46
  47 static const struct ovs_cmdl_command *get_all_commands(void);
  48
  49 OVS_NO_RETURN static void usage(void);
  50 static void parse_options(int argc, char *argv[]);
  51
  52 static const char *default_db(void);
  53 static const char *default_schema(void);
  54
  55 int
  56 main(int argc, char *argv[])
  57 {
  58     set_program_name(argv[0]);
  59     parse_options(argc, argv);
  60     fatal_ignore_sigpipe();
  61     ovs_cmdl_run_command(argc - optind, argv + optind, get_all_commands());
  62     return 0;
  63 }
  64
  65 static void
  66 parse_options(int argc, char *argv[])
  67 {
  68     static const struct option long_options[] = {
  69         {"more", no_argument, NULL, 'm'},
  70         {"verbose", optional_argument, NULL, 'v'},
  71         {"help", no_argument, NULL, 'h'},
  72         {"option", no_argument, NULL, 'o'},
  73         {"version", no_argument, NULL, 'V'},
  74         {NULL, 0, NULL, 0},
  75     };
  76     char *short_options = ovs_cmdl_long_options_to_short_options(long_options);
  77
  78     for (;;) {
  79         int c;
  80
  81         c = getopt_long(argc, argv, short_options, long_options, NULL);
  82         if (c == -1) {
  83             break;
  84         }
  85
  86         switch (c) {
  87         case 'm':
  88             show_log_verbosity++;
  89             break;
  90
  91         case 'h':
  92             usage();
  93
  94         case 'o':
  95             ovs_cmdl_print_options(long_options);
  96             exit(EXIT_SUCCESS);
  97
  98         case 'V':
  99             ovs_print_version(0, 0);
 100             exit(EXIT_SUCCESS);
 101
 102         case 'v':
 103             vlog_set_verbosity(optarg);
 104             break;
 105
 106         case '?':
 107             exit(EXIT_FAILURE);
 108
 109         default:
 110             abort();
 111         }
 112     }
 113     free(short_options);
 114 }
 115
 116 static void
 117 usage(void)
 118 {
 119     printf("%s: Open vSwitch database management utility\n"
 120            "usage: %s [OPTIONS] COMMAND [ARG...]\n"
 121            "  create [DB [SCHEMA]]    create DB with the given SCHEMA\n"
 122            "  compact [DB [DST]]      compact DB in-place (or to DST)\n"
 123            "  convert [DB [SCHEMA [DST]]]   convert DB to SCHEMA (to DST)\n"
 124            "  db-version [DB]         report version of schema used by DB\n"
 125            "  db-cksum [DB]           report checksum of schema used by DB\n"
 126            "  schema-version [SCHEMA] report SCHEMA's schema version\n"
 127            "  schema-cksum [SCHEMA]   report SCHEMA's checksum\n"
 128            "  query [DB] TRNS         execute read-only transaction on DB\n"
 129            "  transact [DB] TRNS      execute read/write transaction on DB\n"
 130            "  [-m]... show-log [DB]   print DB's log entries\n"
 131            "The default DB is %s.\n"
 132            "The default SCHEMA is %s.\n",
 133            program_name, program_name, default_db(), default_schema());
 134     vlog_usage();
 135     printf("\nOther options:\n"
 136            "  -m, --more                  increase show-log verbosity\n"
 137            "  -h, --help                  display this help message\n"
 138            "  -V, --version               display version information\n");
 139     exit(EXIT_SUCCESS);
 140 }
 141
 142 static const char *
 143 default_db(void)
 144 {
 145     static char *db;
 146     if (!db) {
 147         db = xasprintf("%s/conf.db", ovs_dbdir());
 148     }
 149     return db;
 150 }
 151
 152 static const char *
 153 default_schema(void)
 154 {
 155     static char *schema;
 156     if (!schema) {
 157         schema = xasprintf("%s/vswitch.ovsschema", ovs_pkgdatadir());
 158     }
 159     return schema;
 160 }
 161 \f
 162 static struct json *
 163 parse_json(const char *s)
 164 {
 165     struct json *json = json_from_string(s);
 166     if (json->type == JSON_STRING) {
 167         ovs_fatal(0, "\"%s\": %s", s, json->u.string);
 168     }
 169     return json;
 170 }
 171
 172 static void
 173 print_and_free_json(struct json *json)
 174 {
 175     char *string = json_to_string(json, JSSF_SORT);
 176     json_destroy(json);
 177     puts(string);
 178     free(string);
 179 }
 180
 181 static void
 182 check_ovsdb_error(struct ovsdb_error *error)
 183 {
 184     if (error) {
 185         ovs_fatal(0, "%s", ovsdb_error_to_string(error));
 186     }
 187 }
 188 \f
 189 static void
 190 do_create(int argc, char *argv[])
 191 {
 192     const char *db_file_name = argc >= 2 ? argv[1] : default_db();
 193     const char *schema_file_name = argc >= 3 ? argv[2] : default_schema();
 194     struct ovsdb_schema *schema;
 195     struct ovsdb_log *log;
 196     struct json *json;
 197
 198     /* Read schema from file and convert to JSON. */
 199     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &schema));
 200     json = ovsdb_schema_to_json(schema);
 201     ovsdb_schema_destroy(schema);
 202
 203     /* Create database file. */
 204     check_ovsdb_error(ovsdb_log_open(db_file_name, OVSDB_LOG_CREATE,
 205                                      -1, &log));
 206     check_ovsdb_error(ovsdb_log_write(log, json));
 207     check_ovsdb_error(ovsdb_log_commit(log));
 208     ovsdb_log_close(log);
 209
 210     json_destroy(json);
 211 }
 212
 213 static void
 214 compact_or_convert(const char *src_name_, const char *dst_name_,
 215                    const struct ovsdb_schema *new_schema,
 216                    const char *comment)
 217 {
 218     char *src_name, *dst_name;
 219     struct lockfile *src_lock;
 220     struct lockfile *dst_lock;
 221     bool in_place = dst_name_ == NULL;
 222     struct ovsdb *db;
 223     int retval;
 224
 225     /* Dereference symlinks for source and destination names.  In the in-place
 226      * case this ensures that, if the source name is a symlink, we replace its
 227      * target instead of replacing the symlink by a regular file.  In the
 228      * non-in-place, this has the same effect for the destination name. */
 229     src_name = follow_symlinks(src_name_);
 230     dst_name = (in_place
 231                 ? xasprintf("%s.tmp", src_name)
 232                 : follow_symlinks(dst_name_));
 233
 234     /* Lock the source, if we will be replacing it. */
 235     if (in_place) {
 236         retval = lockfile_lock(src_name, &src_lock);
 237         if (retval) {
 238             ovs_fatal(retval, "%s: failed to lock lockfile", src_name);
 239         }
 240     }
 241
 242     /* Get (temporary) destination and lock it. */
 243     retval = lockfile_lock(dst_name, &dst_lock);
 244     if (retval) {
 245         ovs_fatal(retval, "%s: failed to lock lockfile", dst_name);
 246     }
 247
 248     /* Save a copy. */
 249     check_ovsdb_error(new_schema
 250                       ? ovsdb_file_open_as_schema(src_name, new_schema, &db)
 251                       : ovsdb_file_open(src_name, true, &db, NULL));
 252     check_ovsdb_error(ovsdb_file_save_copy(dst_name, false, comment, db));
 253     ovsdb_destroy(db);
 254
 255     /* Replace source. */
 256     if (in_place) {
 257 #ifdef _WIN32
 258         unlink(src_name);
 259 #endif
 260         if (rename(dst_name, src_name)) {
 261             ovs_fatal(errno, "failed to rename \"%s\" to \"%s\"",
 262                       dst_name, src_name);
 263         }
 264         fsync_parent_dir(dst_name);
 265         lockfile_unlock(src_lock);
 266     }
 267
 268     lockfile_unlock(dst_lock);
 269
 270     free(src_name);
 271     free(dst_name);
 272 }
 273
 274 static void
 275 do_compact(int argc, char *argv[])
 276 {
 277     const char *db = argc >= 2 ? argv[1] : default_db();
 278     const char *target = argc >= 3 ? argv[2] : NULL;
 279
 280     compact_or_convert(db, target, NULL, "compacted by ovsdb-tool "VERSION);
 281 }
 282
 283 static void
 284 do_convert(int argc, char *argv[])
 285 {
 286     const char *db = argc >= 2 ? argv[1] : default_db();
 287     const char *schema = argc >= 3 ? argv[2] : default_schema();
 288     const char *target = argc >= 4 ? argv[3] : NULL;
 289     struct ovsdb_schema *new_schema;
 290
 291     check_ovsdb_error(ovsdb_schema_from_file(schema, &new_schema));
 292     compact_or_convert(db, target, new_schema,
 293                        "converted by ovsdb-tool "VERSION);
 294     ovsdb_schema_destroy(new_schema);
 295 }
 296
 297 static void
 298 do_needs_conversion(int argc, char *argv[])
 299 {
 300     const char *db_file_name = argc >= 2 ? argv[1] : default_db();
 301     const char *schema_file_name = argc >= 3 ? argv[2] : default_schema();
 302     struct ovsdb_schema *schema1, *schema2;
 303
 304     check_ovsdb_error(ovsdb_file_read_schema(db_file_name, &schema1));
 305     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &schema2));
 306     puts(ovsdb_schema_equal(schema1, schema2) ? "no" : "yes");
 307     ovsdb_schema_destroy(schema1);
 308     ovsdb_schema_destroy(schema2);
 309 }
 310
 311 static void
 312 do_db_version(int argc, char *argv[])
 313 {
 314     const char *db_file_name = argc >= 2 ? argv[1] : default_db();
 315     struct ovsdb_schema *schema;
 316
 317     check_ovsdb_error(ovsdb_file_read_schema(db_file_name, &schema));
 318     puts(schema->version);
 319     ovsdb_schema_destroy(schema);
 320 }
 321
 322 static void
 323 do_db_cksum(int argc OVS_UNUSED, char *argv[])
 324 {
 325     const char *db_file_name = argc >= 2 ? argv[1] : default_db();
 326     struct ovsdb_schema *schema;
 327
 328     check_ovsdb_error(ovsdb_file_read_schema(db_file_name, &schema));
 329     puts(schema->cksum);
 330     ovsdb_schema_destroy(schema);
 331 }
 332
 333 static void
 334 do_schema_version(int argc, char *argv[])
 335 {
 336     const char *schema_file_name = argc >= 2 ? argv[1] : default_schema();
 337     struct ovsdb_schema *schema;
 338
 339     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &schema));
 340     puts(schema->version);
 341     ovsdb_schema_destroy(schema);
 342 }
 343
 344 static void
 345 do_schema_cksum(int argc, char *argv[])
 346 {
 347     const char *schema_file_name = argc >= 2 ? argv[1] : default_schema();
 348     struct ovsdb_schema *schema;
 349
 350     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &schema));
 351     puts(schema->cksum);
 352     ovsdb_schema_destroy(schema);
 353 }
 354
 355 static void
 356 transact(bool read_only, int argc, char *argv[])
 357 {
 358     const char *db_file_name = argc >= 3 ? argv[1] : default_db();
 359     const char *transaction = argv[argc - 1];
 360     struct json *request, *result;
 361     struct ovsdb *db;
 362
 363     check_ovsdb_error(ovsdb_file_open(db_file_name, read_only, &db, NULL));
 364
 365     request = parse_json(transaction);
 366     result = ovsdb_execute(db, NULL, request, 0, NULL);
 367     json_destroy(request);
 368
 369     print_and_free_json(result);
 370     ovsdb_destroy(db);
 371 }
 372
 373 static void
 374 do_query(int argc, char *argv[])
 375 {
 376     transact(true, argc, argv);
 377 }
 378
 379 static void
 380 do_transact(int argc, char *argv[])
 381 {
 382     transact(false, argc, argv);
 383 }
 384
 385 static void
 386 print_db_changes(struct shash *tables, struct shash *names,
 387                  const struct ovsdb_schema *schema)
 388 {
 389     struct shash_node *n1;
 390
 391     SHASH_FOR_EACH (n1, tables) {
 392         const char *table = n1->name;
 393         struct ovsdb_table_schema *table_schema;
 394         struct json *rows = n1->data;
 395         struct shash_node *n2;
 396
 397         if (n1->name[0] == '_' || rows->type != JSON_OBJECT) {
 398             continue;
 399         }
 400
 401         table_schema = shash_find_data(&schema->tables, table);
 402         SHASH_FOR_EACH (n2, json_object(rows)) {
 403             const char *row_uuid = n2->name;
 404             struct json *columns = n2->data;
 405             struct shash_node *n3;
 406             char *old_name, *new_name;
 407             bool free_new_name = false;
 408
 409             old_name = new_name = shash_find_data(names, row_uuid);
 410             if (columns->type == JSON_OBJECT) {
 411                 struct json *new_name_json;
 412
 413                 new_name_json = shash_find_data(json_object(columns), "name");
 414                 if (new_name_json) {
 415                     new_name = json_to_string(new_name_json, JSSF_SORT);
 416                     free_new_name = true;
 417                 }
 418             }
 419
 420             printf("\ttable %s", table);
 421
 422             if (!old_name) {
 423                 if (new_name) {
 424                     printf(" insert row %s (%.8s):\n", new_name, row_uuid);
 425                 } else {
 426                     printf(" insert row %.8s:\n", row_uuid);
 427                 }
 428             } else {
 429                 printf(" row %s (%.8s):\n", old_name, row_uuid);
 430             }
 431
 432             if (columns->type == JSON_OBJECT) {
 433                 if (show_log_verbosity > 1) {
 434                     SHASH_FOR_EACH (n3, json_object(columns)) {
 435                         const char *column = n3->name;
 436                         const struct ovsdb_column *column_schema;
 437                         struct json *value = n3->data;
 438                         char *value_string = NULL;
 439
 440                         column_schema =
 441                             (table_schema
 442                              ? shash_find_data(&table_schema->columns, column)
 443                              : NULL);
 444                         if (column_schema) {
 445                             const struct ovsdb_type *type;
 446                             struct ovsdb_error *error;
 447                             struct ovsdb_datum datum;
 448
 449                             type = &column_schema->type;
 450                             error = ovsdb_datum_from_json(&datum, type,
 451                                                           value, NULL);
 452                             if (!error) {
 453                                 struct ds s;
 454
 455                                 ds_init(&s);
 456                                 ovsdb_datum_to_string(&datum, type, &s);
 457                                 value_string = ds_steal_cstr(&s);
 458                             } else {
 459                                 ovsdb_error_destroy(error);
 460                             }
 461                         }
 462                         if (!value_string) {
 463                             value_string = json_to_string(value, JSSF_SORT);
 464                         }
 465                         printf("\t\t%s=%s\n", column, value_string);
 466                         free(value_string);
 467                     }
 468                 }
 469                 if (!old_name
 470                     || (new_name != old_name && strcmp(old_name, new_name))) {
 471                     if (old_name) {
 472                         shash_delete(names, shash_find(names, row_uuid));
 473                         free(old_name);
 474                     }
 475                     shash_add(names, row_uuid, (new_name
 476                                                 ? xstrdup(new_name)
 477                                                 : xmemdup0(row_uuid, 8)));
 478                 }
 479             } else if (columns->type == JSON_NULL) {
 480                 struct shash_node *node;
 481
 482                 printf("\t\tdelete row\n");
 483                 node = shash_find(names, row_uuid);
 484                 if (node) {
 485                     shash_delete(names, node);
 486                 }
 487                 free(old_name);
 488             }
 489
 490             if (free_new_name) {
 491                 free(new_name);
 492             }
 493         }
 494     }
 495 }
 496
 497 static void
 498 do_show_log(int argc, char *argv[])
 499 {
 500     const char *db_file_name = argc >= 2 ? argv[1] : default_db();
 501     struct shash names;
 502     struct ovsdb_log *log;
 503     struct ovsdb_schema *schema;
 504     unsigned int i;
 505
 506     check_ovsdb_error(ovsdb_log_open(db_file_name, OVSDB_LOG_READ_ONLY,
 507                                      -1, &log));
 508     shash_init(&names);
 509     schema = NULL;
 510     for (i = 0; ; i++) {
 511         struct json *json;
 512
 513         check_ovsdb_error(ovsdb_log_read(log, &json));
 514         if (!json) {
 515             break;
 516         }
 517
 518         printf("record %u:", i);
 519         if (i == 0) {
 520             check_ovsdb_error(ovsdb_schema_from_json(json, &schema));
 521             printf(" \"%s\" schema, version=\"%s\", cksum=\"%s\"\n",
 522                    schema->name, schema->version, schema->cksum);
 523         } else if (json->type == JSON_OBJECT) {
 524             struct json *date, *comment;
 525
 526             date = shash_find_data(json_object(json), "_date");
 527             if (date && date->type == JSON_INTEGER) {
 528                 long long int t = json_integer(date);
 529                 char *s;
 530
 531                 if (t < INT32_MAX) {
 532                     /* Older versions of ovsdb wrote timestamps in seconds. */
 533                     t *= 1000;
 534                 }
 535
 536                 s = xastrftime_msec(" %Y-%m-%d %H:%M:%S.###", t, true);
 537                 fputs(s, stdout);
 538                 free(s);
 539             }
 540
 541             comment = shash_find_data(json_object(json), "_comment");
 542             if (comment && comment->type == JSON_STRING) {
 543                 printf(" \"%s\"", json_string(comment));
 544             }
 545
 546             if (i > 0 && show_log_verbosity > 0) {
 547                 putchar('\n');
 548                 print_db_changes(json_object(json), &names, schema);
 549             }
 550         }
 551         json_destroy(json);
 552         putchar('\n');
 553     }
 554
 555     ovsdb_log_close(log);
 556     ovsdb_schema_destroy(schema);
 557     /* XXX free 'names'. */
 558 }
 559
 560 static void
 561 do_help(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 562 {
 563     usage();
 564 }
 565
 566 static void
 567 do_list_commands(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 568 {
 569      ovs_cmdl_print_commands(get_all_commands());
 570 }
 571
 572 static const struct ovs_cmdl_command all_commands[] = {
 573     { "create", "[db [schema]]", 0, 2, do_create },
 574     { "compact", "[db [dst]]", 0, 2, do_compact },
 575     { "convert", "[db [schema [dst]]]", 0, 3, do_convert },
 576     { "needs-conversion", NULL, 0, 2, do_needs_conversion },
 577     { "db-version", "[db]",  0, 1, do_db_version },
 578     { "db-cksum", "[db]", 0, 1, do_db_cksum },
 579     { "schema-version", "[schema]", 0, 1, do_schema_version },
 580     { "schema-cksum", "[schema]", 0, 1, do_schema_cksum },
 581     { "query", "[db] trns", 1, 2, do_query },
 582     { "transact", "[db] trns", 1, 2, do_transact },
 583     { "show-log", "[db]", 0, 1, do_show_log },
 584     { "help", NULL, 0, INT_MAX, do_help },
 585     { "list-commands", NULL, 0, INT_MAX, do_list_commands },
 586     { NULL, NULL, 0, 0, NULL },
 587 };
 588
 589 static const struct ovs_cmdl_command *get_all_commands(void)
 590 {
 591     return all_commands;
 592 }